Doorbell monitoring system using ESP32-CAM based on Internet of Things (IoT). Journal of Industrial Automation and Electrical Engineering, [S. l.], v. 1, n. 1, p. 222–228, 2024. Disponível em: https://jiaee.ppj.unp.ac.id/index.php/jiaee/article/view/48. Acesso em: 12 jul. 2025.